The soles of these sneaks have a suspension to soften the feel of rough terrain in off-road runs. When your foot lands, four air-filled chambers compress an elastic skin, which holds the energy until you push off the ground, absorbing shock and giving you extra oomph. $140; newtonrunning.com
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.